Equestria has mastered space travel, and with the founding of the United World's Alliance, ponykind embarks on their journey to explore the unknown. Unfortunately, not everything to be found out there is friendly.

The story of how Captain Mainsail went from a lowly deckhand aboard a civilian vessel to a legendary captain of the Equestrian Navy.

Gallant Topsail has always dreamed of becoming the captain of his own ship. However, his dreams seem to be far from reality as he is merely a cabin boy, but something unecxpected may change that all.